Optimization Of Power And Efficiency For An Irreversible Diesel Heat Engine

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design parameters at maximum power and at maximum thermal efficiency were investigated in the air standard Diesel and dual cycle optimization studies [3-9]. Parlak [5] carried out an optimization based on maximum power and maximum thermal efficiency criteria for irreversible dual and Diesel cycles.

Reciprocating Internal Combustion Engines

Part 4: Heat transfer, NOx and Soot Emissions Day 3 (Spray Modeling) Part 5: Atomization, Drop Breakup/Coalescence Part 6: Drop Drag/Wall Impinge/Vaporization/Sprays Day 4 (Engine Optimization) Part 7: Diesel combustion and SI knock modeling Part 8: Optimization and Low Temperature Combustion Day 5 (Applications and the Future) Part 9: Fuels


characteristics of diesel and additive fuel (Diesel - Biofuel DEE) were investigated on single cylinder four stroke diesel Engine The brake thermal efficiency of diesel is 32.6% and additive bio fuel is 31.12%. Hence the brake thermal efficiency of additive biofuel is almost nearer to the diesel. The

Engine speed effects on the characteristic performance of

irreversible adiabatic processes with the compression and expansion efficiencies. Wang et al. (2002) optimized the power output of Diesel and Otto engines with friction loss during finite times. Rostovtsev et al. (2003) considered how to improve the efficiency of an ideal Otto heat engine. Chen et al. (2003) derived the

Feynman's ratchet optimization: maximum power and maximum

bounds of power output and efficiency for an irreversible Carnot engine Z Yan and L Chen-Recent citations Quantum-dot heat engines with irreversible heat transfer Jianying Du et al-Performance of Feynman s ratchet under a trade-off figure of merit: exact analysis versus estimation from prior information Varinder Singh and Ramandeep S Johal-


Electrification Complicates Efficiency Calculations. 14. 2012 Focus 2L 2013 Focus BEV. Battery. Motor. Fuel. Engine. Bi-directional power flow. Irreversible power flow. 0 200 400 600 800 1000 1200 1400 0 500 1000 1500 2000 Time [s] Energy [Wh] 0 200 400 600 800 1000 1200 1400 0 500 1000 1500 2000 Time [s] Energy [Wh] in out. Energy Energy


Moscato, A. L. S., et al.: Optimization of an Irreversible Otto and Diesel Cycles Based 1194 THERMAL SCIENCE: Year 2018, Vol. 22, No. 3, pp. 1193-1202 between two heat reservoirs at different temperatures. Thus, heat transfers are performed by heat exchangers between the reservoirs and the engine, and irreversibility are due to the thermal

Bulletin of the JSME Journal of Thermal Science and Technology

A new thermodynamic model for turbocharged diesel engines is developed for Miller cycle analysis and optimization. The effects of turbocharger efficiency, Miller degree, combustion mode, and air fuel ratio on engine efficiency, power, and NOx emissions are analyzed by the model. Engine performance is optimized by

erformance imiaion of an rreerible raon cle an rooing e

The schematic of the heat engine is shown in Fig. 1. The model represents an irreversible regenerative closed Brayton cycle. Heat reservoirs and heat exchangers have finite capacitance rates and finite total conductance, respectively. The system comprises of an irreversible adiabatic compressor, a heat regenerator, a pair of heat exchangers and

27th International Conference on Efficiency, Cost

ISBN: 978-1-63439-134-4 27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems


nition engine than either the Diesel cycle or the Otto cycle[2,3]. Recently, the analysis and optimization of thermo-dynamic cycles for different optimization objectives has made tremendous progress by using finite-time thermo-dynamics [4 7]. Chen [8] analyzed and optimized the power potential of a dual cycle considering the effect of


irreversible Dual Miller Cycle cogeneration system [24]. In the present study, apart from the above studies, a comparative performance analysis and optimization based on the power output and thermal efficiency criteria has been performed for an air-standard irreversible internal combustion engine Dual-Miller cycle. The effect of the design

K. Dean Edwards, Tim J. Theiss, Jim C. Conklin, Mike D. Kass

Comprehensive program addresses improved efficiency and optimization of CHP systems and components as well as expanded use of opportunity fuels Combined Heat & Power Activities Develop a state- of-the-art, large-bore, single-cylinder engine research facility Thermodynamic evaluation of recip- and turbine-based CHP engines and systems

Performance optimization of a Diesel cycle with specific heat

role on the power output and the thermal efficiency. They reflect the performance characteristics of an irreversible Diesel cycle engine. The variations of the power output with respect to the compression ratio and the specific heat ratio are indicated in Figure 2. It can be seen that the power output versus the compression ratio characteristic

Performance optimization of a Diesel cycle with specific heat

performance of irreversible reciprocating heat-engine cycle. Al-Sarkhi et al. (2006) found that friction and the temperature-dependent specific heat of the working fluid of a Diesel engine had significant influences on its power output and efficiency. Ge et al. (2007) studied the effects of variable specific heats of the working fluid on

High Efficiency Engine Systems Development and Evaluation

Light duty waste heat recovery has been demonstrated using an organic Rankine cycle Recuperated Rankine cycle Designed to increase engine s peak efficiency (2250 rpm, 18 bar BMEP) Heat input from engine exhaust (no EGR flow at selected engine condition) R245fa working fluid Not designed for underhood packaging

Current Trends in FiniteTime Thermodynamics

namics is clearly one version of irreversible thermodynamics. The immediate inspiration for finite-time thermodynam-ics was the seminal paper by Curzon and Ahlborn[4] in which they showed that a Carnot engine with heat resistance to its reservoirs has a maximal power production, and at that maximum its thermal efficiency can be described by Equa-

Exergoeconomic performance optimization for a steady-flow

power, efficiency, entropy production, cooling load, coefficient of performance, loss of exergy, etc. Salamon and Nitzan [12] viewed the operation of the endoreversible heat engine as a production process with work as its output. They carried out the economic optimization of the heat engine with the maximum profit as the objective function [13].


Fig.7. Efficiency and Power output of reversible and irreversible Semi-Diesel cycles at α = 2, ε = 20 and λ = 1 - 2.5 [91] Figure 7 shows that the growth of the pressure increaseratio, λ from 1 to 1.5 has a significant contribution to thegrowth of the engine Efficiency and the Power output, too.

On Optimization of a Non-Endorreversible Curzon-Ahlborn Cycle

More recently the ecological optimization for generalized irreversible universal heat engine, including Diesel, Otto, Bryton Atkinson, Dual and Miller cycles, with heat resistance, heat leakage and internal irreversibility was carried out for newton heat transfer law [26]. The efficiency

Comparison of Air-Standard Atkinson, Diesel and Otto Cycles

Performance analysis and parametric optimization of an irreversible Atkinson heat-engine are studied by Zhao [3] and Chen [4]. Optimization of Dual cycle considering the effect of combustion process on the power is studied by Chen [5]. The effect of heat transfer on the performance of an air-standard Diesel cycle is studied by Akash [6].

The equivalence of minimum entropy production and maximum

thermal efficiency of an irreversible heat engine would not necessarily result in a decrease in its entropy production. Salamon et al. [2] showed that the maximum

Comparison of performances of air standard Atkinson, Diesel

Performance analyzing and parametric optimum criteria of an irreversible Atkinson heat-engine by Zhao [3] and Chen [4]. Optimization of Dual cycle considering the effect of combustion on power by Chen [5]. Effect of heat transfer on the performance of an air standard Diesel cycle by Akash [6].


portion of the power stroke. Key words: finite rate of combustion, Newton s heat transfer law, irreversible Diesel cycle heat engine, minimum entropy generation, optimal piston motion trajectories, finite time thermodynamics. 1. Introduction Since the efficiency bound of a Carnot engine at maximum power output was derived by

Dynamic and Thermodynamic Examination of a Two- Stroke

an irreversible process and reduces the thermodynamic efficiency of the two-stroke engines except the case where the pre-compression is performed via a turbocharger. The two-stroke engines charged with crankcase pressure may have at most 1.5 times the power of four-stroke engines having the same cylinder


the multiobjective optimization of the various system like refrigerators,28-31 heat engine,32-34 cryogenic cycle, 35,36 irreversible Brayton cycle, 37-41 irreversible Diesel cycle, 42 Stirling SHAH ET AL 1915

On the Optimal Allocation of the Heat Exchangers of

The allocation of the heat exchangers refers to the distribution of the total available area for heat transfer, between the ho t and the cold sides of an irreversible power cycle. Th e irreversible Carnot cycle has been optimized with respect to the allocation ratio of the heat exchangers (Bejan, 1988; Aragón-Gon zález et al., 2009).

Finite-Time Thermodynamic Modeling and a Comparative

the power output and the first and second law efficiencies of an irreversible Miller cycle considering heat-transfer, friction and internal irreversibilities [22]. Ust Y et al. conducted a performance analysis and optimization based on exergetic performance criterion, total exergy output and exergy efficiency


energy , Combined heat and power (CHP) by Hall International Journal of Industrial Electronics and Electrical Engineering, ISSN: 2347-6982 Volume-3, Issue-11, Nov.-2015 Thermal Exergy Optimization Of An Irreversible Cogeneration Cycle

Exergetic Optimization of a Refrigeration Cycle for Re

efficiency of some heat engines at maximum power conditions. Bejan (1989) built the theory of heat transfer-irreversible refrigeration plants. Sahin, Kodal, Yilmaz, & Yavuz (1996) analyzed the maximum power density of an irreversible Joule Brayton engine. Chen, Sun, Wu, & Kiang (1997) analyzed the performance of a regenerative

On the Efficiency for Non-Endoreversible Stirling and

wrote the efficiency of a Curzon and Ahlborn cycle heat engine at maximum power given as m 1. IS , with I. S 1. Velasco et al. [33] assumed the parameter I 1. I. S. as a -independent parameter, and showed that for typical power plants with water as working fluid. Moreover, an adequate model of per-


(Efficiency and Power) of Diesel irreversible cycle with Finite Speed. 5. Work Loss due to FSIT The work loss due to FSIT is given by the difference between the work for the reversible cycle (Wcycle r) and that for the irreversible one (Wcycle ,ir): Wcycle , loss ,FSIT =Wcycle ,r −Wcycl,irr [J] (14) 6. Work Loss due to the Throttling


Jun 10, 2019 Efficiency of a Joule-Brayton engine at maximum power density B Sahin, A Kodal and H Yavuz-Recent citations - Vivek K. Patel et al - Shubhash C. Kaushik et al New thermodynamic analysis and optimization of performance of an irreversible diesel cycle Mohammad H. Ahmadi et al-This content was downloaded from IP address on 10/06/2019


A cogeneration plant, also called a CHP system (Combined Heat and Power), can operate at efficiencies greater than those achieved when heat and power are produced in separate or distinct processes. For example, efficiency values go from 35% 40% for electrical or mechanical production, to 80% 85% for the cogeneration system efficiency.

Energy and Exergy Analysis and Optimization of Combined Heat

law efficiency and exergy efficiency. Thermodynamic optimization of these systems is performed intending to maximize the exergy, when various practical related constraints (imposed mechanical useful energy, imposed heat demand, imposed heat to power ratio) or main physical limitations (limited heat availability, maximum system temperature allowed,

Air standard dual cycle efficiency

standard Diesel cycle using an alternative irreversible heat transfer approach. Energy Convers. Manag. 49, 3301 3304 (2008)Article Google Scholar 21Al-Sarkhi A., Jaber J.O., Abu-Qudais M., Probert S.D.: Effects of friction and temperature-dependent specific-heat of the working fluid on the performance of a Diesel engine. Appl.

Power and Efficiency Analysis of Diesel Cycle Under

Maximum power Maximum power density Performance optimization M irreversibilities existing in a Diesel heat engine are taken and an irreversible cycle model of the Diesel heat engine

Performance investigation into a diesel engine under e ective

a low-heat rejection diesel engine running with di erent vegetable oils and biodiesels. Chintala and Subrama-nian [71] used exergy analysis to assess the maximum useful work of a hydrogen fueled diesel engine. A ckkalp et al. [72] investigated the performance of a diesel-gas engine tri-generation system in Turkey using exergy analysis.

th International Conference on Efficiency, Cost, Optimisation

Local Stability of a Curzon and Ahlborn Engine by Using Simplified Expressions of Efficiency Ladino-Luna, D. Portillo-Díaz, P. Páez-Hernández, R.T. Optimization of an irreversible Carnot engine with a changing phase working fluid Mathilde Blaise, Michel Feidt, Denis Maillet NEW RESULTS CONCERNING OPTIMIZATION OF CARNOT ENGINE

Alternative Equations to Compute the Network and the Thermal

network and power efficiency. Moreover, they investigated the optimization of their model in order to examine the effect of cyclic processes on the performance of irreversible reciprocating heat engine cycle using numerical approach. Their results included the performance properties of irreversible reciprocating Diesel,